| commit | 05ece98f965997649b8d922d224240459bcc1403 | |
| author | Dennis Wölfing <denniswoelfing@gmx.de> | |
| Mon, 7 Jun 2021 11:53:03 +0000 (7 13:53 +0200) | ||
| committer | Gerd Hoffmann <kraxel@redhat.com> | |
| Tue, 15 Jun 2021 05:11:03 +0000 (15 07:11 +0200) | ||
| tree | b4c00b5b559a2a3be02a36309397d1a0dd554bc3 | treesnapshot (tar.gz zip) |
| parent | 1ea06abceec61b6f3ab33dadb0510b6e09fb61e2 | commitdiff |
vga: Allow writing VBE_DISPI_ID5 to ID register
The highest VBE_DISPI_INDEX_ID version supported by QEMU is
VBE_DISPI_ID5. But currently QEMU only allows writing values up to
VBE_DISPI_ID4 to the VBE_DISPI_INDEX_ID register.
As a result of this when a lower version is written to this register and
later VBE_DISPI_ID5 is written back, reads from the register will
continue to report the lower version.
Indeed SeaBIOS is doing that during VGA initialization which causes
guests to always read VBE_DISPI_ID0 instead of the correct version.
Signed-off-by: Dennis Wölfing <denniswoelfing@gmx.de>
Message-Id: <20210607115303.228659-1-denniswoelfing@gmx.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
The highest VBE_DISPI_INDEX_ID version supported by QEMU is
VBE_DISPI_ID5. But currently QEMU only allows writing values up to
VBE_DISPI_ID4 to the VBE_DISPI_INDEX_ID register.
As a result of this when a lower version is written to this register and
later VBE_DISPI_ID5 is written back, reads from the register will
continue to report the lower version.
Indeed SeaBIOS is doing that during VGA initialization which causes
guests to always read VBE_DISPI_ID0 instead of the correct version.
Signed-off-by: Dennis Wölfing <denniswoelfing@gmx.de>
Message-Id: <20210607115303.228659-1-denniswoelfing@gmx.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
| hw/display/vga.c | diffblobblamehistory |